one fable-low hijack cell
pair Vector / scalar
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English with arrow '→' — '{X} → {Y}'
verdictpicked Vector (first-offered)
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# Vector → Scalar Operations
Operations that take vector input and produce a scalar output:
## Common Examples
**1. Dot product** (two vectors → scalar)
$$\mathbf{a} \cdot \mathbf{b} = \sum_i a_i b
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